Improved one cycle control of DC-DC buck converter
08 May 2014-pp 219-223
TL;DR: This paper describes a modified one cycle control technique that controls the duty ratio of a switch in the system that strongly rejects both source side disturbances and load side disturbances.
Abstract: This paper describes a modified one cycle control technique that controls the duty ratio of a switch in the system The one cycle control method gives firmness to the source side disturbances, but this technique shows infirmness with the load side disturbances. The proposed new improved one cycle control technique rectifies the drawbacks of one cycle control technique. It strongly rejects both source side disturbances and load side disturbances. Simulations completed with buck converter and modified one cycle controls and result are discussed.
Citations
More filters
01 Oct 2016
TL;DR: In this article, a type-III compensator is designed for improving the performance of one-cycle controlled buck converter, which can eliminate both input and output disturbance with zero steady-state error.
Abstract: One-cycle control (OCC) is widely used in many power converter topologies because of its advantages. However, in the control process, OCC uses integration of chopped diode voltage to control the output voltage of the converter where, in the case of the dc-dc buck converter, the chopped diode voltage represents only the input voltage. Thus, it will lead to the nonzero steady state error of the output voltage. Moreover, the output disturbance will have more effect to the converter performance. In this paper, a type-III compensator is designed for improving the performance of one-cycle controlled buck converter. Furthermore, the controller can eliminate both input and output disturbance with zero steady-state error. The simulation results verify the performance of the designed controller.
6 citations
Cites background from "Improved one cycle control of DC-DC..."
...Until now, there are some control strategies proposed to meet the requirement such as PI/PID, sliding mode control (SMC), one-cycle control (OCC), fuzzy logic control (FLC), etc [1-9]....
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...[15-17] To deal with the drawbacks of OCC, an approach base on lead-lag compensator or PI/PID[14] can be integrated....
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...The compensator such as PI/PID can be integrated to the one-cycle controlled buck converter as presented by [5]....
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...[15-17] To deal with the drawbacks of OCC, an approach base on lead-lag compensator or PI/PID[14] can be integrated....
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...[11] SW Lee,” Demystifying Type II and Type III Compensators Using OpAmp and OTA for DC/DC Converters”, Texas Instrumentation Application Report Power Management, SLVA662 – July 2014 [12] Liyu Cao,” Type III Compensator Design for Power Converters”, DESIGN feature, Power Electronics Technology,January 2011 [13] Radu ETZ, Dorin Petreus,”An Adaptive Digital Compensation Design for Buck Converter Topology”, Acta Technical Napocensis Elecrtronics and Telecomunications, Volume 52, Number 2, 2011 [14] Subramanian, K....
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4 citations
Cites background from "Improved one cycle control of DC-DC..."
...Substituting (17) into (16), and neglecting the high‐order variables, the DC steady state and AC small signal characteristic expressions can be derived as KLIL1 þ KDVg D 1⁄4 Vc (18)...
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...When the switch is on, voltage across D1 is equal to the power supply vg, ie, vD 1⁄4 vg (15) The equation can be obtained from (13) to (15), KLiL1 þ KDvg d 1⁄4 vc (16) As follows, small signal perturbations(12) superimposed into the dependent variables in (16) are defined vg 1⁄4 Vg þ vg ∧ iL1 1⁄4 IL1 þ iL1 d 1⁄4 Dþ d∧ vc 1⁄4 Vc þ vc (8)>>< >>: (17)...
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TL;DR: In this article, the authors proposed a synthetic trajectory and control law to improve the transient performance of Boost converters when the load changes abruptly, which is achieved on the basis of the nature trajectory in Boost Converters.
Abstract: This paper focuses on an improvement in the transient performance of Boost converters when the load changes abruptly. This is achieved on the basis of the nature trajectory in Boost converters. Three key aspects of the transient performance are analyzed including the storage energy change law in the inductors and capacitors of converters during the transient process, the ideal minimum voltage deviation in the transient process, and the minimum voltage deviation control trajectory. The changing relationship curve between the voltage deviation and the recovery time is depicted through analysis and simulations when the load suddenly increases. In addition, the relationship curve between the current fluctuation and the recovery time is obtained when the load suddenly decreases. Considering the aspects of an increasing and decreasing load, this paper proposes the transient performance synthetic optimized trajectory and control laws. Through simulation and experimental results, the transient performances are compared with the other typical three control methods, and the ability of proposed synthetic trajectory and control law to achieve optimal transient performance is verified.
2 citations
Cites background from "Improved one cycle control of DC-DC..."
...One-cycle control is applicable to large-signal nonlinear systems, and the improved one-cycle control can reject both the source side and load side disturbances of DC-DC converters [11], [12]....
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01 Nov 2020
1 citations
08 Mar 2021
TL;DR: In this paper, a one-cycle controller is proposed to regulate a buck converter operation used in an Uninterruptible Power Supply (UPS) system, which is suitable to be used in the UPS system.
Abstract: This paper proposes a One-cycle Controller (OCC) to regulate a buck converter operation used in an Uninterruptible Power Supply (UPS) system. The controller regulates the buck converter operation to supply a constant DC voltage for charging the UPS battery. This controller exhibits fast transient and dynamic responses to the input power disturbances. It rejects power disturbances by ensuring that the average output voltage value is always proportional to the average control signal. The proposed system is modelled in MATLAB/Simulink to verify the buck converter operation to supply constant DC voltage during short-term and long-term voltage sag and voltage swell problems. The simulation results have proven that OCC can reject voltage disturbances and successfully regulate the buck converter operation. Hence, this controller is suitable to be used in the UPS system.
1 citations
References
More filters
24 Jun 1991
TL;DR: In this article, a large-signal nonlinear control technique is proposed to control the duty-ratio d of a switch such that in each cycle the average value of a switched variable of the switching converter is exactly equal to or proportional to the control reference in the steady-state or in a transient.
Abstract: A new large-signal nonlinear control technique is proposed to control the duty-ratio d of a switch such that in each cycle the average value of a switched variable of the switching converter is exactly equal to or proportional to the control reference in the steady-state or in a transient. One-cycle control rejects power source perturbations in one switching cycle; the average value of the switched variable follows the dynamic reference in one switching cycle; and the controller corrects switching errors in one switching cycle. There is no steady-state error nor dynamic error between the control reference and the average value of the switched variable. Experiments with a constant frequency buck converter have demonstrated the robustness of the control method and verified the theoretical predictions. This new control method is very general and applicable to all types of pulse-width-modulated, resonant-based, or soft-switched switching converters for either voltage or current control in continuous or discontinuous conduction mode. Furthermore, it can be used to control any physical variable or abstract signal that is in the form of a switched variable or can be converted to the form of a switched variable. >
691 citations
13 Jun 1978
TL;DR: In this paper, a switching converter with an LC output filter behaves as a loose-tolerance voltage-controlled current source if each switch closure is ended when switch current reaches an adjustable threshold.
Abstract: A switching converter with an LC output filter behaves as a loose-tolerance voltage-controlled current source if each switch closure is ended when switch current reaches an adjustable threshold. This converter is then combined with an external feedback to produce a precise output voltage. By generating a fixed voltage with a current source in this manner, the converter has many advantages including continuous protection of the switches, stable and equal load sharing when several converters are operated in parallel, inherent overload protection, automatic switch symmetry correction, and fast system response.
319 citations
13 Jun 1978
TL;DR: In this article, a new generation of switching regulators inbedding an LC3 modulator (limit cycle conductance controller) is analyzed and optimized from the point of view of dynamic performances.
Abstract: A new generation of switching regulators inbedding an LC3 modulator (limit cycle conductance controller) is analysed and optimized from the point of view of dynamic performances. This is done by application of the current injected technique to the power stage model which is shown to behave like a first order system for low frequency perturbations. The optimization is carried out by specification of the desired closed loop modes of the system and calculation of the appropriate state variable feedback gains. The correctness of both the analytical model and optimisation procedure is verified by breadboard dynamic measurements.
108 citations
"Improved one cycle control of DC-DC..." refers background in this paper
...In order to eliminate the oscillation that occurs in current mode control [1]-[3], the duty-ratio is greater than or equal to 0....
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26 Jun 1989
TL;DR: In this paper, a method for the design of a linear feedback control law for switching regulators based on the bilinear large-signal model is presented, which guarantees a satisfactory stability region in the state space, and meets the requirements of large damping on transient responses with small feedback control energy.
Abstract: A method for the design of a linear feedback control law for switching regulators based on the bilinear large-signal model is presented. The resulting system guarantees a satisfactory stability region in the state space, and meets the requirements of large damping on transient responses with small feedback control energy. Large-signal transient responses are simulated and compared with the results obtained by R.W. Erickson et al. (1985). The proposed method is well suited for converter topologies with more than two state variables. >
43 citations